CA1316083C - Apparatus for producing thin boards - Google Patents
Apparatus for producing thin boardsInfo
- Publication number
- CA1316083C CA1316083C CA000557707A CA557707A CA1316083C CA 1316083 C CA1316083 C CA 1316083C CA 000557707 A CA000557707 A CA 000557707A CA 557707 A CA557707 A CA 557707A CA 1316083 C CA1316083 C CA 1316083C
- Authority
- CA
- Canada
- Prior art keywords
- feed
- squared timber
- pressure
- contact
- cutter system
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B27—WORKING OR PRESERVING WOOD OR SIMILAR MATERIAL; NAILING OR STAPLING MACHINES IN GENERAL
- B27M—WORKING OF WOOD NOT PROVIDED FOR IN SUBCLASSES B27B - B27L; MANUFACTURE OF SPECIFIC WOODEN ARTICLES
- B27M1/00—Working of wood not provided for in subclasses B27B - B27L, e.g. by stretching
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B27—WORKING OR PRESERVING WOOD OR SIMILAR MATERIAL; NAILING OR STAPLING MACHINES IN GENERAL
- B27B—SAWS FOR WOOD OR SIMILAR MATERIAL; COMPONENTS OR ACCESSORIES THEREFOR
- B27B25/00—Feeding devices for timber in saw mills or sawing machines; Feeding devices for trees
- B27B25/02—Feeding devices for timber in saw mills or sawing machines; Feeding devices for trees with feed and pressure rollers
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B27—WORKING OR PRESERVING WOOD OR SIMILAR MATERIAL; NAILING OR STAPLING MACHINES IN GENERAL
- B27B—SAWS FOR WOOD OR SIMILAR MATERIAL; COMPONENTS OR ACCESSORIES THEREFOR
- B27B25/00—Feeding devices for timber in saw mills or sawing machines; Feeding devices for trees
- B27B25/04—Feeding devices for timber in saw mills or sawing machines; Feeding devices for trees with feed chains or belts
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B27—WORKING OR PRESERVING WOOD OR SIMILAR MATERIAL; NAILING OR STAPLING MACHINES IN GENERAL
- B27L—REMOVING BARK OR VESTIGES OF BRANCHES; SPLITTING WOOD; MANUFACTURE OF VENEER, WOODEN STICKS, WOOD SHAVINGS, WOOD FIBRES OR WOOD POWDER
- B27L5/00—Manufacture of veneer ; Preparatory processing therefor
- B27L5/06—Cutting strips from a stationarily- held trunk or piece by a rocking knife carrier, or from rocking trunk or piece by a stationarily-held knife carrier; Veneer- cutting machines
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T83/00—Cutting
- Y10T83/647—With means to convey work relative to tool station
- Y10T83/6476—Including means to move work from one tool station to another
- Y10T83/6483—Tool stations staggered relative to one another
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T83/00—Cutting
- Y10T83/647—With means to convey work relative to tool station
- Y10T83/6584—Cut made parallel to direction of and during work movement
- Y10T83/6587—Including plural, laterally spaced tools
- Y10T83/6588—Tools mounted on common tool support
Landscapes
- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Wood Science & Technology (AREA)
- Forests & Forestry (AREA)
- Mechanical Engineering (AREA)
- Manufacturing & Machinery (AREA)
- Manufacture Of Wood Veneers (AREA)
- Lubricants (AREA)
- Glass Compositions (AREA)
- Debarking, Splitting, And Disintegration Of Timber (AREA)
- Ultra Sonic Daignosis Equipment (AREA)
- Diaphragms For Electromechanical Transducers (AREA)
- Fats And Perfumes (AREA)
- Details Of Cutting Devices (AREA)
- Management Or Editing Of Information On Record Carriers (AREA)
- Physical Vapour Deposition (AREA)
Abstract
ABSTRACT OF THE DISCLOSURE
The present invention relates to an apparatus for producing thin boards by chipless-cutting separation of the boards from a log or squared timber on one or the opposing sides of the squared timber. The apparatus comprises a feed track for the squared timber and a cutter system that is arranged on one side of the feed track, and an opposing contact-pressure system. In addition, the apparatus comprises feed devices that move the squared timber towards the cutter system, these consisting of at least one pair of feed rollers that grip the squared timber on opposite sides, each pair of feed rollers being arranged so as to be movable floatingly in a direction that is transverse to the feed track, regardless of the clamping force they exert on the squared timber, so as to be able to adapt to the posi-tion of the squared timber that is determined by the con-tact pressure on the cutter system while maintaining symmetrical clamping forces.
The present invention relates to an apparatus for producing thin boards by chipless-cutting separation of the boards from a log or squared timber on one or the opposing sides of the squared timber. The apparatus comprises a feed track for the squared timber and a cutter system that is arranged on one side of the feed track, and an opposing contact-pressure system. In addition, the apparatus comprises feed devices that move the squared timber towards the cutter system, these consisting of at least one pair of feed rollers that grip the squared timber on opposite sides, each pair of feed rollers being arranged so as to be movable floatingly in a direction that is transverse to the feed track, regardless of the clamping force they exert on the squared timber, so as to be able to adapt to the posi-tion of the squared timber that is determined by the con-tact pressure on the cutter system while maintaining symmetrical clamping forces.
Description
~ 13~6083 APPARATUS FOR PRODUCING THIN BOARDS
The present invention relates to an apparatus for producing thin bo~rds by chipless-cutting separation of the boards from a log or squared timber, on one or two opposite sides of the squared timber. 'rhe apparatus has a feed track for the squared timber and ~ cutter sy~tem that is arranged on one side of the feed track, this having one or a plurality of offset blades to separate the boarcls, these blades being arranged in tandem and being either 1xed or arranged so as to swing. Opposite the cutter system there is either a contact-pressure system or a second cutter system that is similar to the first such system, at least the contact-pressure system or one of the cutter ~ystems being such that it can be pressed against the squared timber and thus against the opposite cutter system. In addition the apparatus has a feed system that moves the squared timber towards the blade(s~ if the cutter system, this feed system incorporating one pair of feed rollers that act on the squared timber on opposite sides.
It is basic to chipless separation processes of this kind to achieve adequate surface quality of the boards, although this is rendered extremely difficult on account of the tendency of the wood to split and tear. An apparatus having a cutter blade on one side and, opposite this on the other side, a contact-pressure band with pressure rollers has been tested. In this apparatus, the contact-pressure band with the pressure rollers is used both for applying the contact-pres~ure forces and also ~ 13~083 the forces required to feed the wood. Since, however, the pressure needed to achieve a good quality cut is not necessarily the same as the pressure that is needed to apply the required feed forces towards the cutt~r blade or the cutter-blade set, the contact-pressure forces cannot be selected on the basis of the requirements for the cutting quality alone~
In the case of opposing cutter blade arrangements it is both necessary and known ~rom DE-OS 33 43 294 that feed elements that are separate from the contact-pressure system can be provided, since no feed can be achieved by the contact pressure of the opposing cutter-blade set.
The feed rollers that have been used up to now, which are essentially arranged on swing arms in order to accommodate logs of varying thicknesses, did not offer the possibility of applying great clamping forces for the great feed forces that are required for chipless-cutting separation,~ without the pressure conditions of the wood between the cutter-blade sets being changed with respect to force at the same time, i.e. symmetrically high clamping forces are not possible regardless of the particular position of the log or squared timber at any ~one time.
Thus, it is the task of the present invention, on the one hand, to ma~e it possible to control the contact-clampLng forces required for feeding the timber, regardless of the pressure against the cutter blade and, , `~ on the other, to so configure the feed clamping so that 6 0 ~ 3 it does not interact with the position of the log or squared timber by its contact pressure.
According to the present invention, this task has been solved in that the feed devices that move the s~uared timber consist of at least one pair of feed rollers that grasp the squared timber on opposite sides.
Each pair of feed rollers is arranged so as to float and be movable, regardless of the clamping forces exerted by it against the squared timber, in a direction that is transverse to the feed track, so that it ~an adapt to the position of the squared timber that is determined by the application pressure on the cutter system, whilst maintaining symmetrical clamping forces.
On one possible embodiment, each pair of feed rollers including the force-generating system that applies the clamping force is arranged on a slide that can move freely transversely to the feed direction.
In a preferred embodiment, thP force-generating devices that apply the clamping force are in the form of operating cylinders that are acted upon by pressurized fluid, these being fixed on the frame; in each instance, the operating cylinders of a pair of rollers are connected to each other by a cross-connecting line. A
desired number of pairs o~ feed rollers can be arranged ahead of and behind the cutter system. If, in an apparatus with a cutter system and an opposing contact-pressure rollers that can be pressed against the squar~d timber individually and the contact pressure of these ,.~, ~ .
~316~83 rollers can be transmitted to the squared timbex through a rotating rubber belt, the rubber belt can also pass around the feed rollers that are locat~d on the same side as the contact~pressure system.
The contact-pressure force of the contact-pressure system or of the second cutter system, respectively, is most expediently controllable independentl~ of the clamping force of the feed rollers.
It is advantageous that the pairs of feed rollers ahead of and behind the cutter system are movable ancl adjustable independently of each other, in order that the front pairs of feed rollers can be opened to accept a new squared timber when the preceding squared timber is still being held by the rear pairs of feed rollers.
Since the contact pressure that is required to achieve a high=quality cut does not necessarily coincide with the pressure that is needed to apply the great feed forces against the cutter blades, these elements have been separated. However, the great forces on the feed rollexs must not disturb, with respect to forces, the position of the wood determined by the contact pressure of the wood on the cutter blade. For this reason the pairs of rollers opposite the contact-pressure rollers or the second cutter system have been arranged in a floating position.
The invention will be described in greater detail below on the basis of the embodiments shown in the drawings. These drawings show the following:
~' , ~31608~
Figure 1: A schematic plan view of an apparatus to produce thin boards, this apparatus having a single blade for separating a board from one side of a log.
Figure 2: A schematic plan view of another embodiment of the machine that is provided with two opposing single blades in order to separate a board from each of the opposing sides of the log.
Figure 3: A schematic arrangement of a pair of feed rollers as used in the apparatus shown in figures 1 and 2.
Figure 4: Another arrangement of a pair of feed rollers, these being arranged on a common movable slide.
A squared timber 1 that is being processed passes through an apparatus that is shown in plan view in figure 1 in the direction indicated by the arrow 2 on ~ feed track ~not shown herein), as known in wood-processing systems. This feed track can be in the form o~ an elongated supporting surface that can, if necessary be adjustable for height, and on which:the timber rests and slides along. However, other versione of ~uch a feed track are possible. Essentially, the apparatus that processes the squared timber that is to be processed. It has a left hand frame section 3 and a right-hand frame section 4, of which the right-hand frame section 4 can be moved, for example by means of a worm drive 5 on horizontal slide supports 6, transversely to the direction of feed 2 of the squared timber 1. The support construction 7 for the slide 6 of the right hand frame ~, :
1 3 1 6 ~ 8 3 ~, section 4 can be connected with the left-hand frame section 3 beneath the transport track by means of a common machine base. The ability of the right-hand frame section 4 to move transversely simply ensure that the left-hand and the right-hand parts of the apparatus can be moved apart, and that the apparatus can be adjusted to .
accommodate squared timbers 1 of different widths. In order to process squared timbers of equal widths, the right-hand frame section 4 is adjusted to a fixed position and, for purposes of describing the manner in which the apparatus functions, can hereinafter be regarded as fixed, in the same manner as the left-hand frame section 3.
From the point of view of function, viewed in the direction 2 in which the wood is moved, the machine is divided into an infeed section 8, which is surrounded by a dashed line in order to illustrate its functional composition, the actual cuttlng system 9, and an outfeed section 10, the construction of which corresponds to the infeed section 8 and which is also surrounded by a dashed line for purposes of emphasis. Each of these three functionaI group 8, 9, 10 is divided into a section that is located on the left-hand section of the frame, and a section that is located on the right-hand section of the frame.
The cutter system 9 consists of a blade holder 11, a blade 12 that is secured to this, a pressure rail 13 that is installed ahead of the cutter blade, and guide ~3160~3 surfaces lA that are located on both sides of the blade arrangement. The drawing shows how a thin board 15 is separated from the squared timber 1 by the blade 12 and passed to a schematically represented straightening system 16, although this is o~ no furthler interest in the context of the present invention. A series of pressure rollers 17 is arranged on the frame section 4 opposite the blade arrangement installed on the frame section 3~
Each of these pressure rollers is supported by a swinging arm 18 in a pivot point 19 within the right-hand frame section 4. A pressure cylinder 20 acts on each of the swinging arms 19, the other end of said cylinder being ~ixed to and supported on the right-hand frame section 4.
All of the pressure rollers 17 lie within a circulating rubber belt:21 that passes over two guide rollers 22 and 23, which are also supported~so as to be able to pivot in the rlght-hand frame section 4. Once their pressure cylinders 20 have been acted on hy pressurized~fluid, the pressure rollers press the squared timber 1 against the blade arrangement that is located on the opposite section 3 of the frame. The pressure rollers 17 can be acted on individually or collectively by the pressurized fluid.
~ It~should be emphasized:that the~pressure rail 13 of the blade arrangement extends somewhat further in the direction of the squared~timber 1 than the guide surface I4. Pressing the squared timber 1 against the guide surfaces 14 with the pressure rollers 17 means that the pressure rail 13 is pressed into the squared timber 1 that is moving past. This is necessary to avoid the wood splitting ahead of the blade 13 when the boards 15 are taken off by chipless separation. The pressure and the way and manner in which the squared timber 1 is pressed against the blade arrangement are vital for the quality of the product that is obtained. For this reason the arrangement and the con~iguration of the pressure rollers, as well as control of the application pressure, are all of particular importanceO
In the embodiment shown, there is only a single blade 12. If necessary, however, a plurality of blades can be provided in a staggered, tandem arrangement. It is also possible to arrange the blades in a separate holder in the left-hand frame section 3, in order to impart a swinging movement to them in a direction perpendicular to the plane of the drawing, which extends in the direction of feed 2J during the cutting process.
The infeed system 8 is described below; this description also applies to the outfeed system 10 that is shown and which corresponds to the embodiment shown in figure 1. The infeed system 8 incorporates two pairs of feed rollers 24 and 25, of which each comprises a left-hand feed roller 26 and a right-hand feed roller 27.
Each feed roller 26, 27 is supported by a swinging arm 28 so as to be able to pivot about a pivot point 29 in one of the frame sections 3 or 4, respectively, by means of a swinging arm 28. An operating cylinder 30 is connected to each swinging arm 28, and this is supported in the 1316~183 associated frame section 3, 4, respecti~ely. The pressure roller pair 24 is also shown separately in figure 3. The operating cylinders 30 for the feed rollers 26, 27 can be acted upon by pressurized fluid through a line 31. Their cylinder chambers are, however, additionally cross-connected to each other by a pressure line 32, so that equal pressure is effective in both cylinders 30 of the pressure roller pair 24. The remaining pairs of pressure rollers of the infeed system 8 and the outfeed system 10 are acted upon in the same way. Such cross-connection of the pre~sure chambers of the operating cylinders of a pair of feed rollers ensures that while equal application pressure is maintained on both sides of the squared timber 1, the squared timber 1 will nevertheless be free to move transversely to a specific extent, in order to be able to follow unrestrictedly the working position set by the cutter systém 9, in both the entrance and the out-feed syst~m.
This is of great importance for proper functioning of the cutter system and for achieving good quality in the product. Since large forces are needed to feed the squared timber 1 towards the blade(s) 12, in general a greater application pressure must be applied to the feed rollers 26 and 27 than i needed at the contact-pressure rollers 17 in order to achieve optimal cutting results.
for this reason, it is preferred that the pressure rollers 17 and the feed rollers 26 and 27 can be .~
~ 13~6~83 controlled individually with regard to the amount of fluid pressure that is applied to them.
In the embodiment that is shown in figure 1 r the rubber belt 21 also passes around the right-hand feed roller 27. For this reason, in -this instance the feed forces must also be transferred to the squared timber 1 through the rubber belt 21~ For design reasons, this is a purely expedient measure, since if th~ guide rollers 22 and 23 for the rubber belt are arranged outside the feed rollers 27, these rollers 27 can be positioned closer to the cutter system 9. However, it would also be possible to arrange feed rollers 27 outside the rubber belt 21.
It is reasonable that the feed rollers 26 and 27 should be provided with a drive system (not shown herein).
However, it is also conceivable that the drive be moved into the guide rollers 22 or 23, respectively, or that both systems be provided with drives. This question does not arise in connection with the left-hand feed rollers 26 since there is no rubber belt here to transfer the force. However, it would also be possible to pass a rubber belt around the feed roller 26 on the left-hand side alone.
In the apparatus as shown in figure 1 there is also a front measuring gate 33 and a rear sensor gate 34 located in the vicinity of the infeed system or the outfeed system, respectively. These measuring gates are intended to signal the pre~ence of a squared timber in the infeed system 8 or the outfeed system 10, so as ko `` ~3~83 assist in appropriate control of the systemO It is within the concept of th~ present invention if not only the operating cylinders 20 of each pair of feed rollers 24 or 25, respectively, are connected to each other by a cross-connector line 32; all of the feecl rollers can be connected to each other by cross-connector lines in order to arrive in an even application pressure everywhere.
All that is important is that the squared timber 1 is not forced by the feed rollers into a position that is at variance to that set up by the cutter system 9. However, it is expedient that the feed rollers of the infeed system 8 and those of the outfeed system 10 be controllable independently of each other. Basically, in the case of a continuous series of squared timbers, it is sufficient to have only one feed system. The provision of a second feed system in the form of the outfeed system lS intended to make it possible to pull the end~of a squared timber that is still being processed through the cutter system 9, while the infeed system hàs already~
picked up a new squared timber. When the end of a squared timber passes a sensor gate 33, 34, the associated feed system opens. If the beginning of a new squared timber enters the measuring gate, the associated feed system aloses again.
Figure 2 is a schematic plan view of a variation of the apparatus as shown figure l; this has blades 12 that are opposite each other in order to separate a thin board from each of the sides of a squared timber 1 that are -- ~311~08~
opposite each other. The left-hand cutter system, which is uppermost in the drawing, is exactly the same as ~he one shown in the igure 1. The riyht-hand one 35, which i5 the lower one in figure 2, differs from the one on the left in that is arranged within the right-hand frame section 4 on an independent support 36, this being hinged at one end 37 onto the right-hand frame section 4 and at the other end supported on the right-hand frame section 4 by means of a pressure cylinder 38. The pressure with which the cutter systems 9 and 35 are pressed against the squared timber 1 can be adjusted by pressurized fluid acting on the pressure cylinder 38. The cutter system 35 that is adjustable under pressure replaces the pressure rollers 17 in the version shown in figure 1. Since, according to figure 2 that are two cutter system, the rubber belt that passes around the pressure rollers in figure 1 is also eliminated. For this reason, all the feed rollers 26, 27 lie directly against the squared timber 1. In this embodiment, too, the operating cylinders for the pairs of opposing feed rollers are connected to each other by a cross-connector line.
~ igure 4 shows another embodiment for the freely movable arrangement of a pair of feed rollers. The feed rollers 4 and 41 are located on a slide 42, that can move freely back and forth within guides 43 in a direction that is transverse to the feed direction 2. Since the slide 42 can move transversely, all that is required in this embodiment is to provide one feed roller of a pair - 13 ~
of feed rollers in the example shown, the feed roller 40 with an operating cylinder 44 that is supported on the slide 42 itself~ This embodiment entails not only the disadvantage that it is more costly than the arrangement shown in figures 1 to 3 from the standpoint of design; it also entails the disadvantage that with a limited working travel of the operating cylinder 44 the machine cannot be moved apart as a whole, as is possible by providing the movable frame section 4 in the embodiments shown in figures 1 to 3. The cross-connector line 32 between the working cylinders 30 of the opposing feed rollers can be installed with sufficient reserve length to permit the two side sections of the machine to be moved apart as a whole.
, .~
The present invention relates to an apparatus for producing thin bo~rds by chipless-cutting separation of the boards from a log or squared timber, on one or two opposite sides of the squared timber. 'rhe apparatus has a feed track for the squared timber and ~ cutter sy~tem that is arranged on one side of the feed track, this having one or a plurality of offset blades to separate the boarcls, these blades being arranged in tandem and being either 1xed or arranged so as to swing. Opposite the cutter system there is either a contact-pressure system or a second cutter system that is similar to the first such system, at least the contact-pressure system or one of the cutter ~ystems being such that it can be pressed against the squared timber and thus against the opposite cutter system. In addition the apparatus has a feed system that moves the squared timber towards the blade(s~ if the cutter system, this feed system incorporating one pair of feed rollers that act on the squared timber on opposite sides.
It is basic to chipless separation processes of this kind to achieve adequate surface quality of the boards, although this is rendered extremely difficult on account of the tendency of the wood to split and tear. An apparatus having a cutter blade on one side and, opposite this on the other side, a contact-pressure band with pressure rollers has been tested. In this apparatus, the contact-pressure band with the pressure rollers is used both for applying the contact-pres~ure forces and also ~ 13~083 the forces required to feed the wood. Since, however, the pressure needed to achieve a good quality cut is not necessarily the same as the pressure that is needed to apply the required feed forces towards the cutt~r blade or the cutter-blade set, the contact-pressure forces cannot be selected on the basis of the requirements for the cutting quality alone~
In the case of opposing cutter blade arrangements it is both necessary and known ~rom DE-OS 33 43 294 that feed elements that are separate from the contact-pressure system can be provided, since no feed can be achieved by the contact pressure of the opposing cutter-blade set.
The feed rollers that have been used up to now, which are essentially arranged on swing arms in order to accommodate logs of varying thicknesses, did not offer the possibility of applying great clamping forces for the great feed forces that are required for chipless-cutting separation,~ without the pressure conditions of the wood between the cutter-blade sets being changed with respect to force at the same time, i.e. symmetrically high clamping forces are not possible regardless of the particular position of the log or squared timber at any ~one time.
Thus, it is the task of the present invention, on the one hand, to ma~e it possible to control the contact-clampLng forces required for feeding the timber, regardless of the pressure against the cutter blade and, , `~ on the other, to so configure the feed clamping so that 6 0 ~ 3 it does not interact with the position of the log or squared timber by its contact pressure.
According to the present invention, this task has been solved in that the feed devices that move the s~uared timber consist of at least one pair of feed rollers that grasp the squared timber on opposite sides.
Each pair of feed rollers is arranged so as to float and be movable, regardless of the clamping forces exerted by it against the squared timber, in a direction that is transverse to the feed track, so that it ~an adapt to the position of the squared timber that is determined by the application pressure on the cutter system, whilst maintaining symmetrical clamping forces.
On one possible embodiment, each pair of feed rollers including the force-generating system that applies the clamping force is arranged on a slide that can move freely transversely to the feed direction.
In a preferred embodiment, thP force-generating devices that apply the clamping force are in the form of operating cylinders that are acted upon by pressurized fluid, these being fixed on the frame; in each instance, the operating cylinders of a pair of rollers are connected to each other by a cross-connecting line. A
desired number of pairs o~ feed rollers can be arranged ahead of and behind the cutter system. If, in an apparatus with a cutter system and an opposing contact-pressure rollers that can be pressed against the squar~d timber individually and the contact pressure of these ,.~, ~ .
~316~83 rollers can be transmitted to the squared timbex through a rotating rubber belt, the rubber belt can also pass around the feed rollers that are locat~d on the same side as the contact~pressure system.
The contact-pressure force of the contact-pressure system or of the second cutter system, respectively, is most expediently controllable independentl~ of the clamping force of the feed rollers.
It is advantageous that the pairs of feed rollers ahead of and behind the cutter system are movable ancl adjustable independently of each other, in order that the front pairs of feed rollers can be opened to accept a new squared timber when the preceding squared timber is still being held by the rear pairs of feed rollers.
Since the contact pressure that is required to achieve a high=quality cut does not necessarily coincide with the pressure that is needed to apply the great feed forces against the cutter blades, these elements have been separated. However, the great forces on the feed rollexs must not disturb, with respect to forces, the position of the wood determined by the contact pressure of the wood on the cutter blade. For this reason the pairs of rollers opposite the contact-pressure rollers or the second cutter system have been arranged in a floating position.
The invention will be described in greater detail below on the basis of the embodiments shown in the drawings. These drawings show the following:
~' , ~31608~
Figure 1: A schematic plan view of an apparatus to produce thin boards, this apparatus having a single blade for separating a board from one side of a log.
Figure 2: A schematic plan view of another embodiment of the machine that is provided with two opposing single blades in order to separate a board from each of the opposing sides of the log.
Figure 3: A schematic arrangement of a pair of feed rollers as used in the apparatus shown in figures 1 and 2.
Figure 4: Another arrangement of a pair of feed rollers, these being arranged on a common movable slide.
A squared timber 1 that is being processed passes through an apparatus that is shown in plan view in figure 1 in the direction indicated by the arrow 2 on ~ feed track ~not shown herein), as known in wood-processing systems. This feed track can be in the form o~ an elongated supporting surface that can, if necessary be adjustable for height, and on which:the timber rests and slides along. However, other versione of ~uch a feed track are possible. Essentially, the apparatus that processes the squared timber that is to be processed. It has a left hand frame section 3 and a right-hand frame section 4, of which the right-hand frame section 4 can be moved, for example by means of a worm drive 5 on horizontal slide supports 6, transversely to the direction of feed 2 of the squared timber 1. The support construction 7 for the slide 6 of the right hand frame ~, :
1 3 1 6 ~ 8 3 ~, section 4 can be connected with the left-hand frame section 3 beneath the transport track by means of a common machine base. The ability of the right-hand frame section 4 to move transversely simply ensure that the left-hand and the right-hand parts of the apparatus can be moved apart, and that the apparatus can be adjusted to .
accommodate squared timbers 1 of different widths. In order to process squared timbers of equal widths, the right-hand frame section 4 is adjusted to a fixed position and, for purposes of describing the manner in which the apparatus functions, can hereinafter be regarded as fixed, in the same manner as the left-hand frame section 3.
From the point of view of function, viewed in the direction 2 in which the wood is moved, the machine is divided into an infeed section 8, which is surrounded by a dashed line in order to illustrate its functional composition, the actual cuttlng system 9, and an outfeed section 10, the construction of which corresponds to the infeed section 8 and which is also surrounded by a dashed line for purposes of emphasis. Each of these three functionaI group 8, 9, 10 is divided into a section that is located on the left-hand section of the frame, and a section that is located on the right-hand section of the frame.
The cutter system 9 consists of a blade holder 11, a blade 12 that is secured to this, a pressure rail 13 that is installed ahead of the cutter blade, and guide ~3160~3 surfaces lA that are located on both sides of the blade arrangement. The drawing shows how a thin board 15 is separated from the squared timber 1 by the blade 12 and passed to a schematically represented straightening system 16, although this is o~ no furthler interest in the context of the present invention. A series of pressure rollers 17 is arranged on the frame section 4 opposite the blade arrangement installed on the frame section 3~
Each of these pressure rollers is supported by a swinging arm 18 in a pivot point 19 within the right-hand frame section 4. A pressure cylinder 20 acts on each of the swinging arms 19, the other end of said cylinder being ~ixed to and supported on the right-hand frame section 4.
All of the pressure rollers 17 lie within a circulating rubber belt:21 that passes over two guide rollers 22 and 23, which are also supported~so as to be able to pivot in the rlght-hand frame section 4. Once their pressure cylinders 20 have been acted on hy pressurized~fluid, the pressure rollers press the squared timber 1 against the blade arrangement that is located on the opposite section 3 of the frame. The pressure rollers 17 can be acted on individually or collectively by the pressurized fluid.
~ It~should be emphasized:that the~pressure rail 13 of the blade arrangement extends somewhat further in the direction of the squared~timber 1 than the guide surface I4. Pressing the squared timber 1 against the guide surfaces 14 with the pressure rollers 17 means that the pressure rail 13 is pressed into the squared timber 1 that is moving past. This is necessary to avoid the wood splitting ahead of the blade 13 when the boards 15 are taken off by chipless separation. The pressure and the way and manner in which the squared timber 1 is pressed against the blade arrangement are vital for the quality of the product that is obtained. For this reason the arrangement and the con~iguration of the pressure rollers, as well as control of the application pressure, are all of particular importanceO
In the embodiment shown, there is only a single blade 12. If necessary, however, a plurality of blades can be provided in a staggered, tandem arrangement. It is also possible to arrange the blades in a separate holder in the left-hand frame section 3, in order to impart a swinging movement to them in a direction perpendicular to the plane of the drawing, which extends in the direction of feed 2J during the cutting process.
The infeed system 8 is described below; this description also applies to the outfeed system 10 that is shown and which corresponds to the embodiment shown in figure 1. The infeed system 8 incorporates two pairs of feed rollers 24 and 25, of which each comprises a left-hand feed roller 26 and a right-hand feed roller 27.
Each feed roller 26, 27 is supported by a swinging arm 28 so as to be able to pivot about a pivot point 29 in one of the frame sections 3 or 4, respectively, by means of a swinging arm 28. An operating cylinder 30 is connected to each swinging arm 28, and this is supported in the 1316~183 associated frame section 3, 4, respecti~ely. The pressure roller pair 24 is also shown separately in figure 3. The operating cylinders 30 for the feed rollers 26, 27 can be acted upon by pressurized fluid through a line 31. Their cylinder chambers are, however, additionally cross-connected to each other by a pressure line 32, so that equal pressure is effective in both cylinders 30 of the pressure roller pair 24. The remaining pairs of pressure rollers of the infeed system 8 and the outfeed system 10 are acted upon in the same way. Such cross-connection of the pre~sure chambers of the operating cylinders of a pair of feed rollers ensures that while equal application pressure is maintained on both sides of the squared timber 1, the squared timber 1 will nevertheless be free to move transversely to a specific extent, in order to be able to follow unrestrictedly the working position set by the cutter systém 9, in both the entrance and the out-feed syst~m.
This is of great importance for proper functioning of the cutter system and for achieving good quality in the product. Since large forces are needed to feed the squared timber 1 towards the blade(s) 12, in general a greater application pressure must be applied to the feed rollers 26 and 27 than i needed at the contact-pressure rollers 17 in order to achieve optimal cutting results.
for this reason, it is preferred that the pressure rollers 17 and the feed rollers 26 and 27 can be .~
~ 13~6~83 controlled individually with regard to the amount of fluid pressure that is applied to them.
In the embodiment that is shown in figure 1 r the rubber belt 21 also passes around the right-hand feed roller 27. For this reason, in -this instance the feed forces must also be transferred to the squared timber 1 through the rubber belt 21~ For design reasons, this is a purely expedient measure, since if th~ guide rollers 22 and 23 for the rubber belt are arranged outside the feed rollers 27, these rollers 27 can be positioned closer to the cutter system 9. However, it would also be possible to arrange feed rollers 27 outside the rubber belt 21.
It is reasonable that the feed rollers 26 and 27 should be provided with a drive system (not shown herein).
However, it is also conceivable that the drive be moved into the guide rollers 22 or 23, respectively, or that both systems be provided with drives. This question does not arise in connection with the left-hand feed rollers 26 since there is no rubber belt here to transfer the force. However, it would also be possible to pass a rubber belt around the feed roller 26 on the left-hand side alone.
In the apparatus as shown in figure 1 there is also a front measuring gate 33 and a rear sensor gate 34 located in the vicinity of the infeed system or the outfeed system, respectively. These measuring gates are intended to signal the pre~ence of a squared timber in the infeed system 8 or the outfeed system 10, so as ko `` ~3~83 assist in appropriate control of the systemO It is within the concept of th~ present invention if not only the operating cylinders 20 of each pair of feed rollers 24 or 25, respectively, are connected to each other by a cross-connector line 32; all of the feecl rollers can be connected to each other by cross-connector lines in order to arrive in an even application pressure everywhere.
All that is important is that the squared timber 1 is not forced by the feed rollers into a position that is at variance to that set up by the cutter system 9. However, it is expedient that the feed rollers of the infeed system 8 and those of the outfeed system 10 be controllable independently of each other. Basically, in the case of a continuous series of squared timbers, it is sufficient to have only one feed system. The provision of a second feed system in the form of the outfeed system lS intended to make it possible to pull the end~of a squared timber that is still being processed through the cutter system 9, while the infeed system hàs already~
picked up a new squared timber. When the end of a squared timber passes a sensor gate 33, 34, the associated feed system opens. If the beginning of a new squared timber enters the measuring gate, the associated feed system aloses again.
Figure 2 is a schematic plan view of a variation of the apparatus as shown figure l; this has blades 12 that are opposite each other in order to separate a thin board from each of the sides of a squared timber 1 that are -- ~311~08~
opposite each other. The left-hand cutter system, which is uppermost in the drawing, is exactly the same as ~he one shown in the igure 1. The riyht-hand one 35, which i5 the lower one in figure 2, differs from the one on the left in that is arranged within the right-hand frame section 4 on an independent support 36, this being hinged at one end 37 onto the right-hand frame section 4 and at the other end supported on the right-hand frame section 4 by means of a pressure cylinder 38. The pressure with which the cutter systems 9 and 35 are pressed against the squared timber 1 can be adjusted by pressurized fluid acting on the pressure cylinder 38. The cutter system 35 that is adjustable under pressure replaces the pressure rollers 17 in the version shown in figure 1. Since, according to figure 2 that are two cutter system, the rubber belt that passes around the pressure rollers in figure 1 is also eliminated. For this reason, all the feed rollers 26, 27 lie directly against the squared timber 1. In this embodiment, too, the operating cylinders for the pairs of opposing feed rollers are connected to each other by a cross-connector line.
~ igure 4 shows another embodiment for the freely movable arrangement of a pair of feed rollers. The feed rollers 4 and 41 are located on a slide 42, that can move freely back and forth within guides 43 in a direction that is transverse to the feed direction 2. Since the slide 42 can move transversely, all that is required in this embodiment is to provide one feed roller of a pair - 13 ~
of feed rollers in the example shown, the feed roller 40 with an operating cylinder 44 that is supported on the slide 42 itself~ This embodiment entails not only the disadvantage that it is more costly than the arrangement shown in figures 1 to 3 from the standpoint of design; it also entails the disadvantage that with a limited working travel of the operating cylinder 44 the machine cannot be moved apart as a whole, as is possible by providing the movable frame section 4 in the embodiments shown in figures 1 to 3. The cross-connector line 32 between the working cylinders 30 of the opposing feed rollers can be installed with sufficient reserve length to permit the two side sections of the machine to be moved apart as a whole.
, .~
Claims (9)
1. An apparatus used to produce thin boards by chipless cutting separation of the boards from a log or squared timber on one or opposing sides of the squared timber, with a feed track for the squared timber, a first cutter system positioned on one side of the feed track having one cutting blade to separate a single board or a plurality of cutting blades arranged in a staggered configuration to separate multiple boards, and including a guide member preceding the first cutter system, a contact-pressure system or a second cutter system corresponding to the first cutter system that is opposite the first cutter system on the other side of the feed track, at least the contact-pressure system or the second cutter system, respectively, being pressable towards the squared timber and thus against the opposite first cutter system, and a feed device that moves the squared timber towards the cutting blade(s), the feed device having at least one pair of feed rollers that grip the squared timber on opposing sides, wherein that at least one pair of feed rollers is arranged so as to float in a direction transverse to the feed track, regardless of the clamping force that it exerts against the squared timber, in order to be able to adapt to the position of the squared timber that is determined by the contact pressure on the cutter system while maintaining symmetrical clamping forces.
2. An apparatus as defined in claim 1, wherein each pair of feed rollers including the force-generating devices is arranged on a slide that can move freely transversely to the direction of feed.
3. An apparatus as defined in claim 1, in which the force-generating devices that apply the clamping force are operating cylinders that are acted upon by pressurized fluid, wherein the operating cylinder of each pair of feed rollers is supported on the frame and their cylinder cham-bers are connected to each other by means of a cross-connector line.
4. An apparatus as defined in claim 1 wherein the feed roller pairs are provided ahead of and behind the cutter system.
5. An apparatus as defined in claim 4, wherein at:
least two pairs of feed rollers are provided ahead of and behind the cutter system.
least two pairs of feed rollers are provided ahead of and behind the cutter system.
6. An apparatus as defined in 1, with a cutter system and an opposing contact-pressure system, wherein the contact-pressure system comprises a series of individual contact-pressure rollers that can be pressed against the squared timber, the contact pressure of which is trans-ferred to the squared timber through a rotating rubber belt.
7. An apparatus as defined in claim 6, wherein the rubber belt also passes around the feed rollers located on the side of the contact-pressure system.
8. An apparatus as defined in any one of the claims 1 to 3, wherein the contact force of the contact-pressure system or of the second cutter system is controllable inde-pendently of the clamping force of the feed roller pairs.
9. An apparatus as defined in any one of the claims 4 to 6, wherein the feed roller pairs ahead of and after the cutter system can be moved apart and adjusted indepen-dently of each other.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE19873702909 DE3702909A1 (en) | 1987-01-31 | 1987-01-31 | DEVICE FOR THE PRODUCTION OF THICK BOARDS |
| DEP3702909.6 | 1987-01-31 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA1316083C true CA1316083C (en) | 1993-04-13 |
Family
ID=6319954
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA000557707A Expired - Fee Related CA1316083C (en) | 1987-01-31 | 1988-01-29 | Apparatus for producing thin boards |
Country Status (8)
| Country | Link |
|---|---|
| US (1) | US4825917A (en) |
| EP (1) | EP0277591B1 (en) |
| JP (1) | JPS63214403A (en) |
| AT (1) | ATE79584T1 (en) |
| CA (1) | CA1316083C (en) |
| DE (3) | DE3702909A1 (en) |
| FI (1) | FI86697C (en) |
| NO (1) | NO164584C (en) |
Families Citing this family (23)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3926396A1 (en) * | 1989-08-10 | 1991-02-14 | Linck Masch Gatterlinck | Chipless conversion of tree into boards - involves use of adjustable pressure bar ahead of slicing knife |
| DE4042357A1 (en) * | 1989-11-01 | 1991-10-24 | Linck Masch Gatterlinck | Method for slicing sheets of wood of equal thickness |
| DE4026346A1 (en) * | 1989-11-01 | 1991-05-02 | Linck Masch Gatterlinck | METHOD FOR SPANLESS SPLITING OF A QUANTITY WOOD IN BOARDS OF THE SAME THICKNESS |
| DE3936314A1 (en) * | 1989-11-01 | 1991-05-02 | Linck Masch Gatterlinck | MULTI-LAYER SOLID WOOD PRODUCTS LIKE BARS, BOARDS AND GLUE BINDERS AND METHOD FOR THE PRODUCTION THEREOF |
| DE3936312A1 (en) * | 1989-11-01 | 1991-05-02 | Linck Masch Gatterlinck | Laminated wood panels formed from narrow laminations - which are glued edge to edge to form sheets which are glued together |
| DE4026349C1 (en) * | 1990-08-21 | 1991-11-14 | Gebrueder Linck Maschinenfabrik "Gatterlinck" Gmbh & Co Kg, 7602 Oberkirch, De | Slicing thin sheets of wood - involves forcing series of sharp knives through wood for cutting without formation of chips |
| DE4033471A1 (en) * | 1990-10-20 | 1992-04-23 | Linck Masch Gatterlinck | METHOD AND DEVICE FOR THE CHIP-FREE SEPARATION OF WOOD LAMPS FROM A SQUARE |
| DE4038486A1 (en) * | 1990-12-03 | 1992-06-04 | Linck Masch Gatterlinck | DEVICE FOR CUTTING PRODUCTION OF THICK BOARDS |
| DE4117474A1 (en) * | 1991-05-28 | 1992-12-03 | Hamberger Industriewerke Gmbh | METHOD AND DEVICE FOR PRODUCING WOOD LAMPS |
| DE4201339C1 (en) * | 1992-01-20 | 1992-07-23 | Gebrueder Linck Maschinenfabrik "Gatterlinck" Gmbh & Co Kg, 7602 Oberkirch, De | |
| US5400843A (en) * | 1992-04-14 | 1995-03-28 | Gebruder Linck Maschinenfabrik "Gatterlinck" Gmbh & Co. Kg | Apparatus for controlling the taper of wood boards formed by a chipless cutting operation |
| DE4244310C1 (en) * | 1992-12-28 | 1993-10-28 | Linck Masch Gatterlinck | Method for cutting squared piece of timber into thin planks - involves squared timber piece whose thickness vertical to cutting plane of blade is greater than sum of thicknesses of whole number of planks of predetermined thickness |
| CA2114672C (en) * | 1993-11-12 | 1999-03-16 | Aaron U. Jones | Sawing apparatus |
| US5771586A (en) * | 1994-09-07 | 1998-06-30 | Flexible Steel Lacing Company | Apparatus for skiving belt ends |
| US5881786A (en) * | 1997-06-10 | 1999-03-16 | Weyerhaeuser Company | Method of producing wood strips for conversion into composite lumber products |
| EP0932123B1 (en) * | 1998-01-23 | 2003-12-03 | BEB Industrie-Elektronik AG | Device for handling valuable papers |
| US6378692B1 (en) * | 1999-10-04 | 2002-04-30 | Lockheed Martin Corporation | Take-away mechanism for mail or other flat article handling system |
| NL1023232C2 (en) * | 2003-04-22 | 2004-10-26 | Franciscus Antonius Ma Heijden | Wooden plank or beam production method, by cutting tree trunk in length direction and hot pressing |
| JP5512648B2 (en) * | 2011-12-28 | 2014-06-04 | セイコープレシジョン株式会社 | X-ray processing equipment |
| US20160221327A1 (en) * | 2012-10-12 | 2016-08-04 | Heidelberger Druckmaschinen Ag | Web insertion device for a flat-bed die-cutting machine, manufacturing system for packages and method for feeding a web of printing material |
| US11090896B2 (en) * | 2012-10-12 | 2021-08-17 | Heidelberger Druckmaschinen Ag | Web insertion device for a flat-bed die-cutting machine, manufacturing system for packages and method for feeding a web of printing material |
| CN114179175A (en) * | 2021-12-21 | 2022-03-15 | 杭州简筑装饰工程有限公司 | Home decoration plate cutting device with good protection effect |
| IT202200002024A1 (en) * | 2022-02-04 | 2023-08-04 | Ecosys S R L | APPARATUS FOR PROCESSING AND/OR TREATMENT OF AN EDGE REGION OF A WORKPIECE |
Family Cites Families (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US1503784A (en) * | 1922-04-08 | 1924-08-05 | Commw Mfg Company | Machine for producing rattan weaving strips |
| JPS5160084A (en) * | 1974-11-20 | 1976-05-25 | Matsushita Electric Ind Co Ltd | Itajobuzaino setsudansochi |
| US3494396A (en) * | 1953-02-02 | 1970-02-10 | Weyerhaeuser Co | Apparatus for kerfless cutting of wood |
| US3295569A (en) * | 1962-05-31 | 1967-01-03 | Corlise M Sweet | Machine for cutting wood with a fixed blade |
| US3727654A (en) * | 1971-04-21 | 1973-04-17 | Marunaka Tekkosho Inc | Planer machine |
| SE431621B (en) * | 1980-07-03 | 1984-02-20 | Kockums Ind Ab | DEVICE FOR INSTALLATION OF WOOD BLOCK LONG A LOADING ROAD IN A WOODWORKING MACHINE |
| AT368929B (en) * | 1980-12-22 | 1982-11-25 | Rautio Kauko | CENTERING AND FEEDING DEVICE FOR A MACHINE TO MACHINE ROUND STEM |
| DE3343294A1 (en) * | 1983-11-30 | 1985-06-05 | Gebrüder Linck Maschinenfabrik und Eisengießerei "Gatterlinck", 7602 Oberkirch | DEVICE FOR PRODUCING CANNED WOOD BY SPANLESS SEPARATION OF SIDEBOARDS |
| CA1264433A (en) * | 1985-12-23 | 1990-01-16 | Troels A. Jaeger | Wood slicing machine |
-
1987
- 1987-01-31 DE DE19873702909 patent/DE3702909A1/en not_active Withdrawn
- 1987-01-31 DE DE8701511U patent/DE8701511U1/en not_active Expired
-
1988
- 1988-01-28 EP EP88101211A patent/EP0277591B1/en not_active Expired - Lifetime
- 1988-01-28 AT AT88101211T patent/ATE79584T1/en not_active IP Right Cessation
- 1988-01-28 DE DE8888101211T patent/DE3873782D1/en not_active Expired - Fee Related
- 1988-01-29 NO NO880400A patent/NO164584C/en unknown
- 1988-01-29 FI FI880415A patent/FI86697C/en not_active IP Right Cessation
- 1988-01-29 CA CA000557707A patent/CA1316083C/en not_active Expired - Fee Related
- 1988-01-30 JP JP63021129A patent/JPS63214403A/en active Pending
- 1988-02-01 US US07/150,939 patent/US4825917A/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| EP0277591A2 (en) | 1988-08-10 |
| FI86697B (en) | 1992-06-30 |
| NO880400L (en) | 1988-08-01 |
| JPS63214403A (en) | 1988-09-07 |
| EP0277591B1 (en) | 1992-08-19 |
| US4825917A (en) | 1989-05-02 |
| DE8701511U1 (en) | 1988-05-26 |
| NO880400D0 (en) | 1988-01-29 |
| EP0277591A3 (en) | 1989-11-15 |
| FI86697C (en) | 1992-10-12 |
| FI880415A (en) | 1988-08-01 |
| ATE79584T1 (en) | 1992-09-15 |
| NO164584B (en) | 1990-07-16 |
| DE3702909A1 (en) | 1988-08-11 |
| NO164584C (en) | 1990-10-24 |
| FI880415A0 (en) | 1988-01-29 |
| DE3873782D1 (en) | 1992-09-24 |
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Legal Events
| Date | Code | Title | Description |
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| MKLA | Lapsed |